<html>
    <head>
        <title>Test</title>
        <style>
@import url(folder-view.css);         
folder { size:*; }
        </style>
        <script>

document.on("file-activate", function(evt) {
  console.log("file-activate", evt.data);
});

        </script>
    </head>
    <body>

<folder filter="*.htm;*.html;*.png;*.jpg" />

    </body>
</html>